3 . Recently it has been noticed _____ an increasing number of students are bringing smartphones to school, _____ means using smartphones reasonably has become _____ unavoidable topic for us students.

A．/; that; a

B．that; which; an

C．/; which; an

D．that; which; the

5 . 下列每个句子错误的地方已经标注出来，在句子后面的括号内写出正确的用法。
1. The reason why he is late again is because he gets up late again.
2. All the people who get involved ^the accident will be punished.
3. If we can participate in the game depends on the weather.
4. He said that he has spend 400,000 yuan on the house.
5. Apply oil to the injured area is a bad idea,which can keep the heat in the wounds may cause infection.
6. As far as I’m concern, I sincerely hope that everyone can make use of mobile phones properly.
7. Hear the news, they immediately set off for Shanghai.
8. One of the most largest shopping mall in North America is in Edmonton.
9. Water consists in oxygen and hydrogen.
10. We should know some knowledge about first aid, that can help us to save someone’s life.

9 . Shorter hours of sunlight and cooler temperatures also relate to higher rates of depression, ________ is linked to an increase in drinking.（用适当的词填空）